holy $h1t...lol $500! dang that betta blow ur head clean off ur shoulders lol! yea being in the 9th grade my money supply is quiet limited...my most complicated disighn was this http://www.spudfiles.com/forums/viewtopic.php?t=3769& but 50 was an estiment.. i still need some more pvc pipe. this may be my last penu with a sprinkler vanve lol i'll have to come up with somtin faster. well keep the prices comin lol this is fun to see.